July 5, 2009, The Washington Post — Twitter has been hailed as an incredibly useful marketing tool for businesses and brands, both big and small, to disseminate information and engage with consumers on a massive scale. But what about non-profits? The ability to use social media to fundraise for charitable purposes has been questionable. A few months ago, the Washington Post reported that Causes, one of Facebook's popular applications used by non-profits to raise money, was not netting much money for charities, despite its large amount of users (according to the application's page, it has 26 million monthly users).